Help, continuous output beam

Hello,
Help, I have a problem ...
I use Pangolin Quickshow with FB3 (USB).
The laser output works great, but when I send no signal is issued a fine jet, in my head it's green laser blue at the satellite.
This beam is already as soon as I plug the FB3 by ILDA without which it is connected to the PC.
Why is that?

I mean, if its blue, it could be that they used an diode laser where the treshold is set to high. Why it shows when you connect an dac, could be cause you complete the security circuit, which will allow the laser to start.

I have had this happen as well, It is a problem with the ground on diode drivers. Typically it has to do with improper projector grounding scheme. I Usually fixed quickly by ground lifting the Projector or eliminating the ground to Pin 25 from the FB3

There is a lot more going on but usually a quick fix. Read Bill's article on grounding it is AWESOME.
Larry